Soft x-ray camera for internal shape and current density measurements on a noncircular tokamak

Technical Report · Sun May 01 04:00:00 EDT 1988

DOI:https://doi.org/10.2172/7231472· OSTI ID:7231472

Fonck, R J; Jaehnig, K P; Powell, E T; Reusch, M; Roney, P; Simon, M P

Soft x-ray measurements of the internal plasma flux surface shaped in principle allow a determination of the plasma current density distribution, and provide a necessary monitor of the degree of internal elongation of tokamak plasmas with a noncircular cross section. A two-dimensional, tangentially viewing, soft x-ray pinhole camera has been fabricated to provide internal shape measurements on the PBX-M tokamak. It consists of a scintillator at the focal plane of a foil-filtered pinhole camera, which is, in turn, fiber optically coupled to an intensified framing video camera (/DELTA/t />=/ 3 msec). Automated data acquisition is performed on a stand-alone image-processing system, and data archiving and retrieval takes place on an optical disk video recorder. The entire diagnostic is controlled via a PDP-11/73 microcomputer. The derivation of the polodial emission distribution from the measured image is done by fitting to model profiles. 10 refs., 4 figs.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 7231472
• Report Number(s): PPPL-2518; ON: DE88011872
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
CAMAC SYSTEM
CAMERAS
CLOSED PLASMA DEVICES
CURRENT DENSITY
DATA ACQUISITION SYSTEMS
ELECTROMAGNETIC RADIATION
FIBER OPTICS
IMAGE PROCESSING
IONIZING RADIATIONS
MAGNETIC FIELD CONFIGURATIONS
MAGNETIC SURFACES
OPTICAL SYSTEMS
PBX DEVICES
PERFORMANCE
PLASMA DIAGNOSTICS
PROCESSING
RADIATIONS
SHAPE
SOFT X RADIATION
TELEVISION CAMERAS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
X RADIATION